The development of the Student Selection Battery for the Beginning Teacher Evaluation Study is described. This battery, which measures reading and mathematics achievement in second and fifth grade students, will be used to select target students for the study of teaching effectiveness. Methodological considerations included: the limited amount of available testing time, the selection of items that would be appropriate predictors of achievement during later testing sessions, the effect of the testing programs on students' attitudes toward school--particularly at the beginning of grade two, and the requirement that students of "average" academic ability be selected. The development of the second grade reading battery is described. It was recommended that students scoring between the 25th and 68th percentiles on this test be selected for participation in the study. The development of the other three batteries--second grade mathematics, fifth grade reading and mathematics--was similar to the first battery described. The determination of cutting scores, and the particular difficulty in selecting the lower cutting scores, are also discussed. (GDC)